UndefinedTicksPerSecond 2143 coders/miff.c          if (image->ticks_per_second != UndefinedTicksPerSecond)
UndefinedTicksPerSecond 1221 coders/mpc.c           if (image->ticks_per_second != UndefinedTicksPerSecond)
UndefinedTicksPerSecond  190 magick/image.c   image->ticks_per_second=UndefinedTicksPerSecond;